define([ "dojo/_base/declare",
	"esri/geometry/Extent",
	"esri/SpatialReference",
	"esri/geometry/Point",
	"esri/layers/TileInfo",
	"esri/layers/TiledMapServiceLayer" ], function(declare, Extent, SpatialReference, Point, TileInfo, TiledMapServiceLayer) {
	return declare("districtLayer", TiledMapServiceLayer, {
		constructor : function() {
			this.spatialReference = new SpatialReference({
				wkid : 102113
			});
			this.initialExtent = new Extent(-20037508.342787, -20037508.342787, 20037508.342787, 20037508.342787, this.spatialReference);
			this.fullExtent = new Extent(-20037508.342787, -20037508.342787, 20037508.342787, 20037508.342787, this.spatialReference);
			//  
			this.tileInfo = new TileInfo({
				"dpi" : "90.71428571427429",
				"format" : "image/png",
				"compressionQuality" : 0,
				"spatialReference" : {
					"wkid" : "3857"
				},
				"rows" : 256,
				"cols" : 256,
				"origin" : {
					"x" : -20037508.342787,
					"y" : 20037508.342787
				},

				// Scales in DPI 96  
				"lods" : [ {
					"level" : 0,
					"scale" : 591657527.591555,
					"resolution" : 156543.033928
				}, {
					"level" : 1,
					"scale" : 295828763.795777,
					"resolution" : 78271.5169639999
				}, {
					"level" : 2,
					"scale" : 147914381.897889,
					"resolution" : 39135.7584820001
				}, {
					"level" : 3,
					"scale" : 73957190.948944,
					"resolution" : 19567.8792409999
				}, {
					"level" : 4,
					"scale" : 36978595.474472,
					"resolution" : 9783.93962049996
				}, {
					"level" : 5,
					"scale" : 18489297.737236,
					"resolution" : 4891.96981024998
				}, {
					"level" : 6,
					"scale" : 9244648.868618,
					"resolution" : 2445.98490512499
				}, {
					"level" : 7,
					"scale" : 4622324.434309,
					"resolution" : 1222.99245256249
				}, {
					"level" : 8,
					"scale" : 2311162.217155,
					"resolution" : 611.49622628138
				}, {
					"level" : 9,
					"scale" : 1155581.108577,
					"resolution" : 305.748113140558
				}, {
					"level" : 10,
					"scale" : 577790.554289,
					"resolution" : 152.874056570411
				}, {
					"level" : 11,
					"scale" : 288895.277144,
					"resolution" : 76.4370282850732
				}, {
					"level" : 12,
					"scale" : 144447.638572,
					"resolution" : 38.2185141425366
				}, {
					"level" : 13,
					"scale" : 72223.819286,
					"resolution" : 19.1092570712683
				}, {
					"level" : 14,
					"scale" : 36111.909643,
					"resolution" : 9.55462853563415
				}, {
					"level" : 15,
					"scale" : 18055.954822,
					"resolution" : 4.77731426794937
				}, {
					"level" : 16,
					"scale" : 9027.977411,
					"resolution" : 2.38865713397468
				}, {
					"level" : 17,
					"scale" : 4513.988705,
					"resolution" : 1.19432856685505
				}, {
					"level" : 18,
					"scale" : 2256.994353,
					"resolution" : 0.597164283559817
				}, {
					"level" : 19,
					"scale" : 1128.497176,
					"resolution" : 0.298582141647617
				} ]
			});
			this.loaded = true;
			this.onLoad(this);
		},
		getTileUrl : function(level, row, col) {
			return "http://mt" + (col % 4) + ".google.cn/vt/lyrs=h@177000000&hl=zh-CN&gl=cn&" + "x=" + col + "&" +
				"y=" +
				row +
				"&" +
				"z=" +
				level +
				"&s=";
		}
	});
});